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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Rosen, Harry R.
    Type: Article
    In: American journal of botany
    Volume: 3
    Issue: 7
    Date: 1916-07
    Page Range: 337--360
    Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-